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104 lines
4.8 KiB
HTML
104 lines
4.8 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>WEEKNUM Function</title>
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<h1>WEEKNUM Function</h1>
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<p>The <b>WEEKNUM</b> function is one of the <a href="../UsageInstructions/InsertFunction.htm#datetime" onclick="onhyperlinkclick(this)">date and time functions</a>. It used to return the number of the week the specified date falls within the year.</p>
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<h3>Syntax</h3>
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<p><b><em>WEEKNUM(serial_number, [return_type])</em></b></p>
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<p>The <b>WEEKNUM</b> function has the following arguments:</p>
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<table style="width: 40%">
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<tr>
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<th style="background-color: #f4f4f4" width="150ch"><b>Argument</b></th>
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<th style="background-color: #f4f4f4"><b>Description</b></th>
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</tr>
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<tr>
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<td><b><em>serial_number</em></b></td>
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<td>A number representing the date within the week, entered using the <a href="Date.htm" onclick="onhyperlinkclick(this)">DATE</a> function or other date and time function.</td>
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</tr>
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<tr>
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<td><b><em>return_type</em></b></td>
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<td>A numeric value used to determine on which day the week begins. The possible values are listed in the table below.</td>
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</tr>
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</table>
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<p>The <b><em>return_type</em></b> argument can be one of the following:</p>
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<table style="width: 40%">
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<tr>
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<th style="background-color: #f4f4f4"><b>Numeric value</b></th>
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<th style="background-color: #f4f4f4"><b>Week begins on</b></th>
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<th style="background-color: #f4f4f4"><b>System</b></th>
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</tr>
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<tr>
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<td><b><em>1 or omitted</em></b></td>
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<td>Sunday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>2</em></b></td>
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<td>Monday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>11</em></b></td>
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<td>Monday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>12</em></b></td>
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<td>Tuesday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>13</em></b></td>
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<td>Wednesday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>14</em></b></td>
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<td>Thursday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>15</em></b></td>
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<td>Friday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>16</em></b></td>
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<td>Saturday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>17</em></b></td>
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<td>Sunday</td>
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<td><b><em>1</em></b></td>
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</tr>
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<tr>
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<td><b><em>21</em></b></td>
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<td>Monday</td>
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<td><b><em>2</em></b></td>
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</tr>
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</table>
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<h3>Notes</h3>
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<p>When <b><em>return_type</em></b> is set to 1-17, <b>System 1</b> is used. This means that the first week in a year is the week that contains January 1.</p>
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<p>When <b><em>return_type</em></b> is set to 21, <b>System 2</b> is used. This means that the first week in a year is the week that contains the first Thursday of the year. System 2 is commonly used in Europe according to the ISO 8601 standard.</p>
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<p><a href="../UsageInstructions/InsertFunction.htm#applyfunction" onclick="onhyperlinkclick(this)">How to apply</a> the <b>WEEKNUM</b> function.</p>
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<h3>Examples</h3>
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<p>The figure below displays the result returned by the <b>WEEKNUM</b> function.</p>
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<p><img alt="WEEKNUM Function" src="../images/weeknum.png" /></p>
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</div>
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</body>
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</html> |